An engineering image from the James Webb Space Telescope has turned out to be a stunning view of the universe. It is comparable to the deepest Hubble Deep Field images.

The space observatory is able to find and lock onto its observing targets with the help of the Fine Guidance Sensor. The FGS is able to take pictures.

In May, the team decided to keep the imagery that was being captured. To lock onto one star and to test how well it could roll to one side were the objectives of the engineering test.

The depth quality of this image is similar to the early engineering images that were taken after the process to fully focus the telescope was completed. The images from each segment were similar to the famous Hubble Deep Field images, but even deeper.

This Fine Guidance Sensor test image was acquired in parallel with NIRCam imaging of the star HD147980 over a period of eight days at the beginning of May. This engineering image represents a total of 32 hours of exposure time at several overlapping pointings of the Guider 2 channel. The observations were not optimized for detection of faint objects, but nevertheless the image captures extremely faint objects and is, for now, the deepest image of the infrared sky. The unfiltered wavelength response of the guider, from 0.6 to 5 micrometers, helps provide this extreme sensitivity. The image is mono-chromatic and is displayed in false color with white-yellow-orange-red representing the progression from brightest to dimmest. The bright star (at 9.3 magnitude) on the right hand edge is 2MASS 16235798+2826079. There are only a handful of stars in this image – distinguished by their diffraction spikes. The rest of the objects are thousands of faint galaxies, some in the nearby universe, but many, many more in the distant universe. Credit: NASA, CSA, and FGS team.

The FGS engineering image is among the deepest images of the universe to have been taken. Scientists said that it is impossible to study the age of the galaxies in this image with the rigor needed for scientific analysis because FGS doesn't use color filters like the other science instruments. FGS is able to produce stunning views of the universe even when it is not in use.

Talk about an overachiever!

Gaze at this test image — an unexpected & deep view of the universe — captured by Webb’s Fine Guidance Sensor (FGS) in May. Built by @csa_asc to point Webb precisely at targets, taking glamour shots isn’t even FGS’s main job: https://t.co/aQUAFHcNV5 pic.twitter.com/uYoh4t8PX2